| # - Define macro to determine endian type |
| # Check if the system is big endian or little endian |
| # TEST_BIG_ENDIAN(VARIABLE) |
| # VARIABLE - variable to store the result to |
| # |
| |
| MACRO(TEST_BIG_ENDIAN VARIABLE) |
| IF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$") |
| MESSAGE(STATUS "Check if the system is big endian") |
| MESSAGE(STATUS "Searching 16 bit integer") |
| |
| INCLUDE(CheckTypeSize) |
| |
| CHECK_TYPE_SIZE("unsigned short" CMAKE_SIZEOF_UNSIGNED_SHORT) |
| IF(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2) |
| MESSAGE(STATUS "Using unsigned short") |
| SET(CMAKE_16BIT_TYPE "unsigned short") |
| ELSE(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2) |
| CHECK_TYPE_SIZE("unsigned int" CMAKE_SIZEOF_UNSIGNED_INT) |
| IF(CMAKE_SIZEOF_UNSIGNED_INT) |
| MESSAGE(STATUS "Using unsigned int") |
| SET(CMAKE_16BIT_TYPE "unsigned int") |
| |
| ELSE(CMAKE_SIZEOF_UNSIGNED_INT) |
| |
| CHECK_TYPE_SIZE("unsigned long" CMAKE_SIZEOF_UNSIGNED_LONG) |
| IF(CMAKE_SIZEOF_UNSIGNED_LONG) |
| MESSAGE(STATUS "Using unsigned long") |
| SET(CMAKE_16BIT_TYPE "unsigned long") |
| ELSE(CMAKE_SIZEOF_UNSIGNED_LONG) |
| MESSAGE(FATAL_ERROR "no suitable type found") |
| ENDIF(CMAKE_SIZEOF_UNSIGNED_LONG) |
| |
| ENDIF(CMAKE_SIZEOF_UNSIGNED_INT) |
| |
| ENDIF(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2) |
| |
| |
| CONFIGURE_FILE("${CMAKE_ROOT}/Modules/TestEndianess.c.in" |
| "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c" |
| IMMEDIATE @ONLY) |
| |
| FILE(READ "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c" |
| TEST_ENDIANESS_FILE_CONTENT) |
| |
| TRY_COMPILE(HAVE_${VARIABLE} |
| "${CMAKE_BINARY_DIR}" |
| "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c" |
| OUTPUT_VARIABLE OUTPUT |
| COPY_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin" ) |
| |
| IF(HAVE_${VARIABLE}) |
| |
| FILE(STRINGS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin" |
| CMAKE_TEST_ENDIANESS_STRINGS_LE LIMIT_COUNT 1 REGEX "THIS IS LITTLE ENDIAN") |
| |
| FILE(STRINGS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin" |
| CMAKE_TEST_ENDIANESS_STRINGS_BE LIMIT_COUNT 1 REGEX "THIS IS BIG ENDIAN") |
| |
| # on mac, if there are universal binaries built both will be true |
| # return the result depending on the machine on which cmake runs |
| IF(CMAKE_TEST_ENDIANESS_STRINGS_BE AND CMAKE_TEST_ENDIANESS_STRINGS_LE) |
| IF(CMAKE_SYSTEM_PROCESSOR MATCHES powerpc) |
| SET(CMAKE_TEST_ENDIANESS_STRINGS_BE TRUE) |
| SET(CMAKE_TEST_ENDIANESS_STRINGS_LE FALSE) |
| ELSE(CMAKE_SYSTEM_PROCESSOR MATCHES powerpc) |
| SET(CMAKE_TEST_ENDIANESS_STRINGS_BE FALSE) |
| SET(CMAKE_TEST_ENDIANESS_STRINGS_LE TRUE) |
| ENDIF(CMAKE_SYSTEM_PROCESSOR MATCHES powerpc) |
| MESSAGE(STATUS "TEST_BIG_ENDIAN found different results, consider setting CMAKE_OSX_ARCHITECTURES or CMAKE_TRY_COMPILE_OSX_ARCHITECTURES to one or no architecture !") |
| ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_BE AND CMAKE_TEST_ENDIANESS_STRINGS_LE) |
| |
| IF(CMAKE_TEST_ENDIANESS_STRINGS_LE) |
| SET(${VARIABLE} 0 CACHE INTERNAL "Result of TEST_BIG_ENDIAN" FORCE) |
| MESSAGE(STATUS "Check if the system is big endian - little endian") |
| ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_LE) |
| |
| IF(CMAKE_TEST_ENDIANESS_STRINGS_BE) |
| SET(${VARIABLE} 1 CACHE INTERNAL "Result of TEST_BIG_ENDIAN" FORCE) |
| MESSAGE(STATUS "Check if the system is big endian - big endian") |
| ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_BE) |
| |
| IF(NOT CMAKE_TEST_ENDIANESS_STRINGS_BE AND NOT CMAKE_TEST_ENDIANESS_STRINGS_LE) |
| MESSAGE(SEND_ERROR "TEST_BIG_ENDIAN found no result!") |
| ENDIF(NOT CMAKE_TEST_ENDIANESS_STRINGS_BE AND NOT CMAKE_TEST_ENDIANESS_STRINGS_LE) |
| |
| FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log |
| "Determining if the system is big endian passed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n") |
| |
| ELSE(HAVE_${VARIABLE}) |
| MESSAGE(STATUS "Check if the system is big endian - failed") |
| FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log |
| "Determining if the system is big endian failed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n") |
| SET(${VARIABLE}) |
| ENDIF(HAVE_${VARIABLE}) |
| ENDIF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$") |
| ENDMACRO(TEST_BIG_ENDIAN) |
| |
| |
